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Your search keyword '"Krinitsyn, M. G."' showing total 4 results
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4 results on '"Krinitsyn, M. G."'

1. Fabrication of porous composites from Ti3AlC2 and Al2O3 for potential separation membrane supports.

Author

Dyussambayev, A. K., Krinitsyn, M. G., Krotkevich, D. G., Koptsev, M. O., and Kashkarov, E. B.

Subjects
*MEMBRANE separation, *SLIP casting, *ALUMINUM composites, *SCANNING electron microscopy, *X-ray microscopy, *ALUMINUM oxide, *TITANIUM composites
Abstract

In the present work, Al2O3/Ti3AlC2 composites with different composition ratios was fabricated. The composites were sintered at 1550°C from blanks produced by slip casting. The microstructure and phase composition of the samples were analysed by scanning electron microscopy and X-ray diffraction, respectively. Gas permeability tests were investigated using a gas reaction automated machine. It is shown that the porosity of composites increases with increasing Ti3AlC2 content in the raw material. The composite Ti3AlC2/Al2O3 (1/2) with the highest porosity (40 %) had a maximum hydrogen flow of 200 mol/(m2s). [ABSTRACT FROM AUTHOR]

Published
2023
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2. Structure and Oxidation Resistance of Titanium Silicide Ti5Si3–Titanium Binder Powder Composites.

Author

Pribytkov, G. A., Krinitsyn, M. G., Korzhova, V. V., Firsina, I. A., and Korosteleva, E. N.

Subjects
*TITANIUM oxidation, *SILICIDES, *TITANIUM oxides, *POWDERS, *TITANIUM powder, *COMPOSITE structures, *TITANIUM
Abstract

In the gasless combustion mode of powder mixtures of titanium and silicon, titanium silicide Ti5Si3–titanium ligament metal–matrix composites were synthesized. The structure of the composites consists of silicide grains separated by titanium binder interlayers with a thickness that depends on the titanium content in the reaction mixtures. During oxidation in air at temperatures up to 1000°C, the predominant oxidation of the titanium binder occurs with the formation of titanium oxide TiO2 (rutile). [ABSTRACT FROM AUTHOR]

Published
2022
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3. High-temperature mechanical properties of MAX-phase based functionally graded laminated composites fabricated from preceramic papers.

Author

Krotkevich, D. G., Kashkarov, E. B., Krinitsyn, M. G., and Travitzky, N.

Subjects
*LAMINATED materials, *FUNCTIONALLY gradient materials, *COMPOSITE plates, *FLEXURAL strength, *PLASMA temperature
Abstract

This paper describes the fabrication and high-temperature mechanical properties of functionally graded materials (FGM) based on preceramic papers with Ti3Si(Al)C2 and Ti3Al(Si)C2 powder fillers. The FGMs with different architectures were fabricated by spark plasma sintering at a temperature of 1050°C and a pressure of 50 MPa. Mechanical testing of composites at 25℃ and 1050℃ demonstrated the brittle to plastic transition of fracture mechanism. At 1050 ℃ FGMs demonstrated strain for up to 1.5 % and flexural strength about 200 MPa. Due to migration of Al from A-site of MAX-phases and formation of Al2O3 a crack healing was noted after high-temperature mechanical tests. [ABSTRACT FROM AUTHOR]

Published
2023
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4. Composites Synthesized from Titanium, Carbon and Aluminum Powder Compositions.

Author

Pribytkov, G. A., Firsina, I. A., Korzhova, V. V., Baranovskii, A. V., and Krinitsyn, M. G.

Subjects
*ALUMINUM powder, *ELECTRON probe microanalysis, *TITANIUM powder, *TITANIUM, *ISOSTATIC pressing, *TITANIUM carbide, *SCANNING electron microscopy
Abstract

The paper presents the results of the X-ray diffraction analysis, scanning electron microscopy, and electron probe micro-analysis of the products synthesized from the titanium, carbon (soot), and aluminum powder compositions in the wave combustion mode. It is found that the carbon/aluminum ratio in the reactive powder compositions has an effect on the combustion temperature, phase composition, and structure of the synthesis products. The major phase in the synthesis products is titanium carbide with the particle size monotonically decreasing in the composite structure with decreasing carbon/aluminum ratio in the reactive powder compositions resulting from the reduction in the combustion temperature. Based on the structural investigations of the synthesized composites, their practical application as feedstocks is discussed in relation to the coating deposition and cladding, and as bulk materials consolidated via hot isostatic pressing or spark plasma sintering. [ABSTRACT FROM AUTHOR]

Published
2022
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